<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>my html4</title>
</head>
<body style="background-color: silver; color: blue">
<h1 style="text-align: center">达内云计算 Cloud Computing</h1>
<hr style="color: red">
<div>达内云计算 Cloud Computing</div>
</body>
</html>